Needle-valve.



G. J. COLEMAN.

NEEDLE VALVE.

APPLIOATION FILED SEPT. 12, 1907. RENEWED FEB. 24, 1012. 1,038,527.

Patented Sept. 17, 1912.

4 W4 W I ZZ 25in 69.

Wie nesses."

CLYDE J. COLEMAN, OF NEW YORK,

N. Y., YORK,

ASSIGNOB, T CONRAD HUBERT, OF NEW N. Y.

. a NEEDLE-VALVE.

To all whom it may concern:

Specification of Letters Patent.

Patented Sept. 1? 1912.

l Application filed September 12, 1907, Serial No. 392,575. BenewedFebruary 24, 1912. Serial No. 679,766.

and useful Improvement in Needle-Valves,

of which the following is a specification, reference being had thereinto the accompany-= ing drawings, forming part thereof.

My invention relates to valves and relates particularly to such valvesas are adapted for use on portable tanks or storage reser-Y use.

in claims. r

The illustrated embodiment of my invention comprises a pin member 1,for'attaclr voirs for containing gases under high pres-- 15 sure forilluminating purposes, such, for example, as actylene gas. One of thecom-i mon uses of such port-able gas tanks is upon; automobiles, forsupplying illuminant to thef lamps thereof. For such uses the gasstorage tank is necessarily comparatively small, to save weight andspace, and must there-; fore be'charged to an extremelyhigh pressure tosupply sufficient illuminant for thef desired length of time,

-. The smallness of the storage reservoir and,

the high initial pressure of the stored gas introduce the difliculty inthe use of the gas that the pressure falls rapidly, necessitating veryfrequent adjustments of the valve to preserve the lamp flame of propersize; and the chief object of my present invention is? Other objects andadvantages will appear; from the following description.

My invention includes means controlled by the high pressure fluid forcontrolling the amountof fluid supplied to the point of;

My invention V also includes various de-= tails of construction andcombinations off parts. s i

I will now describe the embodiment of'i my invention illustrated in theaccompany-Q ing drawing, which Shows a longitudinal;

central section of the complete valve, to-. gether with portions ofcontiguous parts, and will't-hereafter point out my invention ment to asource of uid under pressure, for example, a contalner 16, a portlononly of which" is shown,: and a valve-carrying cap member- 2, shown asunited by screw threads to the plug 1. .The plug lvhas a longitudi- 6and forms a continuation'of the servicenal service-passage 3 whichcommunicates,

through the valve mechanism hereinafter described, with a transverseservice-passage 4 provided "in the member 2, the direction of flow offluid when used being as indicated by the arrows. A service-duct 5,leading to the point of use and shown as broken away, is connected to anipple formed on the member 2 by an ordinary screw connector-ring passae 4. 7

Delivery of fluid through passage 4 and duct 5 is automaticallycontrolled by a compensating valve mechanism which in turn is controlledby the pressure of the high. pressure fluid in the container 16 andpassage 3. Such mechanism comprises a iap'hragm 7 clamped between themembers 1 and 2 and made fluid-tightby a packlug-ring 8 which may be ofalummum.

The member 1 is cup-shaped or hollowed out at its top to form a chamber9 constituting a pressure-chamber or diaphragmchamber, of which thediaphragm forms one wall, and the member 2 is also shown as slightlyhollowed out or cup-shaped and in coiiperation with the packing-ringBforms a free space or receiving-chamber 10 above the diaphragm. Thepassage 3 forms an inlet for the pressure-chamber 9 and an outlettherefor is formed in a valve-seat 11 3 carried at the center of thediaphragm.

The valve-seat 11 is shown as secured to the diaphragm by a nut 12, andthe joint is made fluid-tight by a washer 13, the valveseatbeing in theform of a tubular stud.

A tapered valve proper or needle valve 14 issupported in the member 2and coacts with the valve-seat 11, which has a flaring opening forreceiving the tapered portion the valve. The valve 14 has a threadedengagement with the member 2 and has a handle portion extending to theoutside, through an ordinary packing gland as shown, for manualadjustment of the valve relatively to its seat. The nut 12 extendsupward some distance from the diaphragm in the form of a tube or sleeveand is guided at its uppermost portion on the shank or stem portion ofthe needle valve 14, so as to assure at all times a proper seating ofthe ,valve, as otherwise the diaphragm might at times buckle or twistand prevent proper coaction or cotiperation of the valve and valve-seat.The bore of the tubular nut 12 is reduced at its upper portion forguidance on the valve and is rovided with counterbores for exit of fluidpaming the valve. The upwardly-extending portion of the nut 12 isloosely received in a bore 15 in the member 2 and which communicateswith the service-bore 4 therein.

In the operation of the device the valve may be opened more or less orcompletely closed ofl at any time by adjustment of the valve proper 14'in the usual manner.

When the valve'is firmly closed the head of tially and that the valve liis firmly closed against its seat. As the valve14= is moved in itsopening direction, by unscrewing, the

valve-seat 11 will follow the opening movement of the valve for acertain distance and until, the tension of the diaphragm becomes equalto the pressure of the fluid in the pressure-chamber 9, the valve ofcourse remaining seated or f closed up to this point. Further openingmovement of the valve 14 will separate it from its seat and permit flowof fluid from passage 3 out through service-duct 5 to point of use. Thevalve may now be opened to a greater or less extent to permit more orless fluid to pass as desired. When the valve has once been adjusted nofurther adjustment or attention will be necessary,-as the initialadjustment a serves also as a final adjustment, even However, if thesize of the valve-opening remained the same, less fluid would passtherethrough and the light would accordingly grow dim as the pressure.in the contamer became reduced from usage of fluid therefrom. Thistendency is oflset by the compensating action of the valve mechanism. Asthe pressure of fluid in the container becomes reduced the pressure offluid in the pressure-chamber 9 is correspond mgly less and failing tolonger balance the tension of the diaphragm, an inward movement of thediaphragm takes place, separating the valve-seat." 11 more widely fromthe valve 14, thus compensating for the re-- duced pressure by providinga larger open mg, whereby substantially thesame quantity of fluid isdelivered-to the point of use irrespective of whether the pressure inthe container is high or low. I Y

Inthe drawing the device is indicated as in use, the outlet-valve 14being represented as open and the diaphragm 7 as bent outward bypressure of fluid in the pressurechamber 9 and controlling the escape ofthe fluid in accordance with the amount of pressure in the container 16as explained above- It is obvious that various modifications may be madein the construction shown and above particularly described within theprinciple and scope of my invention.

I claim 1. A valve mechanism comprisinga pressure-chamber provided withan inlet and an outlet, a diaphragm forming a Wall of thepressure-chamber, a valve-seat carried by the diaphragm, an outlet valvecoactive with the valve-seat and having a stem extending outward, and aguidefor the valve-seat carried by the diaphragm and guided by. the

valve stem. 4

2. A valve mechanism comprising a pressure-chamber provided with aninlet and an outlet, a diaphragm forming a wall of the pressure-chamber,a valve-seat carried by the diaphragm, an outlet-valve coactive withvthe valve-seat from the outside of the pressure-chamber, the co-actionof'thevalve and its seat being controlled by the diaphragm, and meansfor imparting opening and closing movements to the valve inde pendentlyof'the diaphragm, the valve-seat being adapted to rest on the bottom ofthe pressure-chamber when the valveis firmly closed by said means,whereby the diavphragmv isrelieved of excessive strain.

3. A valve mechanism comprisinga pressure chamber provided with an inletand an outlet, a diaphragm forming a wall of the pressure chamber.avalve seat carried by the diaphragm, an outlet valve coactive with thevalve seat from the outside of the pressure chamber and having a stemextending outward, the coaction of the valve and its seat beingcontrolled by the d1a-' phra 'm, and a guide for the valve seat carriedby the diaphragm and guided by the valve stem, the valve stem beingmanually operable for imparting opening and closing movements to thevalve independently of the diaphragm and the valve seat being adapted torest on the bottom of'the pressure chamber when the valve isfirmlyclosedby manual actuation.

In testimony whereof I aflix ture in presence of two w tnesses.

CLYDE J. (JOLEM ARQ s Witnesses: I n

WM. AsnLEY Km Hammer H. Grass.

